My NAS is an 8th gen i7 Dell Optiplex I got on ebay for like $175. Running TrueNAS CORE. With a shucked 18tb WD Easystore that was a black Friday deal at $200. Watch https://shucks.top/ for good deals on storage. My rig is a little more than you want to spend, but you wouldn't need the 18tb drive to start with. And you could save a bit more if you went with an i5 instead.
My NAS is an 8th gen i7 Dell Optiplex I got on ebay for like $175. Running TrueNAS CORE. With a shucked 18tb WD Easystore that was a black Friday deal at $200. Watch https://shucks.top/ for good deals on storage. My rig is a little more than you want to spend, but you wouldn't need the 18tb drive to start with. And you could save a bit more if you went with an i5 instead.
save